Automatic brake for talking-machines.



w'. N. DENMSON. AUTOMATIC BRAKE FOR TALKING MACHINES.

APPLICATION HLED SEPT- 8. I910.

. .b 7 w m. r5 n 4 I E E J. u an I mew i. 4 MET.- M //V E W w n m u 6 wm m P w r L V B 9 9 a 1 E m 1 ATTORNEY all/W w. nzwmsom. v AUTOMATICBRAKE FOR TALKING MACHINES.

-APPLICATIQN FILED SEPT. 8. I919. 1,21 9,379. Patented Mar. 13, 1917 4SHEETS-SHEET 2- WITNI'I'IS INVENTOR w. M. DENNISON.

AUTOMATIC BRAKE FOR TALKING MACHINES. APPLICATION mm S'EPTB, 1910.

Patented Mar. 13, 1917.

56 VINVENTOR VWZum/Vflemulsnn. Y

. wrrrvsssss w i BY W W arrokusv I w. mfnsmmsow. AUTOMATIC BRAKE FORTALKINGMACHINES. APPLICATION FILED SEPT. a. mo. 1,219,379. PatentedMan13,1917.

4 SHEETS-SHEET 4.

60 m l l I L 91 II 6 1 f/ 6 I 6/ 2 3 g K K INVENTOR I 9 165 T" F2 06 55g Wham/N 5612;120:011,

. WITNESSES I av n {6 L? ATTORNEY.

UNITED STATES" PATENT OFFICE.

WILBUBN N. DENNISON, OF MERCHANTVILLE BOROUGH, NEW JERSEY, ASSIGNOR TOVICTOR TALKING MACHINE COMPANY, A CORPORATION OF NEW JERSEY.

AUTOMATIC BRAKE FOR TALKING-MACHINES.

Specification of Letters Patent.

Patented Mar. 13, 1917.

To all whom it may concern:

Be it known that I, lVlLBURN N. DENNI- son, a citizen of the UnitedStates, and a resident of the borough of Merchantville, county ofCamden, and State of New Jersey, have invented certain new and usefulImprovements in Automatic Brakes for Talk ing-hlachines of which thefollowing is a full, clear, and exact disclosure, reference being had tothe accompanying drawings, forming a part of this specification.

The main objects of this invention are, to provide an improved brakeadapted to be used in combination with a talking machine; to provideanimproved autou'iatic brake for a talking machine which may be actuatedeither automatically by the operation of the talking machine or whichmay be actuated manually; to provide a stop mechanism with meanspermitting the set ting thereof to effect the stopping of the turn-tableat substantially any predetermined point in the sound reproduction andpermitting the adjustment thereof to operate with sound records ofdifferent lengths; v

to provide a stop mechanism with frictional means permitting theactuating member of said mechanism to be adjusted to different positionsin the path of the tone arm; to provide a. stop mechanism with a pair ofcoaxially pivoted members one of which operates to effect the stoppingof the turntable and the other of which is operated by the tone arm,together with a frictional conucction between said members; to providean improved brake in which the lnraking action will take place graduallyand with gradually increasing force 3 to provide in combination with atalking machine having a turntable for supporting disk records andprovided with a downwardly projecting annular flange, an improvedautomatic bra ke, the main portion of which is a rrangcd beneath theturntable and which is adapted to engage against the inner surface ofthe annular flange of the turntable; and to provide other improvementsas will appear hereinafter.

In the (.lrawings, l igure 1 is a. fragmentary top plan view of atalking machine provided with an automatic brake constructed inaccordance with this invention; Fig. 2 a fragmentary perspective of thesame; Fig. 3 a fragmentary perspective of the same showing the brake inoperative position;

Fig. i a fragmentary perspective of the same showing the brake ininoperative position; Figs. 5 and 6 are perspectives of details of thesame; Fig. 7 is a fragmentary side elevation partly in vertical section,of a portion of the same; and Figs. 8 and 9 are fragmentary views of amodified detail of construction.

Referring to the drawing, one embodiment of this invention comprises atalking machine provided with the usual or any suitable casing orcabinet 1, containing the usual actuating mechanism for rotating theusual spindle 2, which projects upwardly through the upper side 23, ofthe casing l, and which carries mounted upon its upper cnd a flatcircular turntable it, arranged above the upper side of the casing i.and provided with a downwardly extending marginal annular flange or rim5, having a cylindrical inner surface 6, coaxial ol' the axis ofrotation of the turntable.

The talking machine is provided with the usual or any suitable hollowtone arm ll), carrying at its inner end a sound reproduce:

or sound box 11, adapted to cooperate usual with a record mounted. uponthe turntable. The outer and oi the toncarm 10 is pivotally supported asusual. and may conimunicate with any suitable ai'nplilier l3.

Arrangwl beneath the turntable 4, and 'ithin the marginal flange 5thereof is a plate 1?, which forms a base or support for some of themovable portions of this in) proved bralie. This plate elotacl'iablyscoured to the upper sl'iriare of the upper side 3 of the motor casing,by ows 16 or by other suitable means, and has an u'i'wari. y projectingcar 1? at one end, provided w th a circular aymrture 1S harming ahearing i'ma reduced end 1 at a fool; nail shoulder between this r:luced end and the main portion of the sin t being in engage ment withthe inner sorta we of the our 13. to prevent movement of the sl'mttlongltlnli 'nally toward the car. The shall '20 preter- 7 ol the base15.

ably secured to the shaft by means of a set screwiio, the collar beingarranged to bear against the front end of the bearing 22, a recess 26being provided in the upper side 3 of the casing beneath the collar, inwhich the collar is freely rotatable. ()n the rear end of the shaft 20and in the rear of the bearing 22, is rigidly secured a collar 27,having pro-. jccting rearwardly downwardly therefrom and rigidtherewith, a stud 28 forming a crank whereby the shaft 20 n'iay berotated auton'nitieally by means to be hereinafter describcd, the. upperside of the casing being provided with a suitable recess.

A brake shoe or pad 30 is located beneath the turntable and adjacent theinternal surface of the rim 5 of the turntable 4.. This brake shoe 30 iscounted upon the free end of one branch of an angular arm or bell cranklever 31, the other branch of which is pivoted adjacent its outer end tothe base 15 of the brake, upon a vertical stud 32, this latter branch ofthe lever being mounted to slide horizontally about its pivot in-ahorizontal slot 33, formed in the forward edge of an upturned portion 3%of the base 15, the walls of the slot 33, forming a guide for the arm asit oscillates.

To oscillate the brake pad 30 in a'horizontal plane about its pivot 32,to throw it into and out of engagement with the internal cylindricalsurface 6 of the rim 5 of the turntable, a flat link 35 is pivoted atone end to the arm 31, adjacent its vertex in the rear of the pad 30 byavertical headed pintle 36, and'.at its other end to a laterally movablevertical pintle 37, to which is also pivoted one end of a Hat link 38,the other end of which extends rearwardly and is loosely ahd slidablymounted in a horizontal slot Elf), of an upturned portion or bearing 40,The rear end of the latter link 58 is provided with a pin 41 in the rearof its hearing if), and between the bearing t0 and the pintle 37, thislink is surrounded by a compressed spiral spring 42, which normallyforces this link forwardly and keeps the pin 41 at the rear end ol thelink always -in engagement with the rear surface of the bearing 40.

The two links and 38 and their conv u I 0 I nectmg pintle 2-37 arecombined in the to'rm of a toggle joint which is actuated by anintermediate link L5, one end of which is pivoted upon the pintle 36,and the other end of which extends inwardly and is providerl with a stud4L6 rigid therewith, which projects above and below this link. The upperend of the stud 46 engages loosely in an oblong slot 47, ot a hand lever48, which is pivoted intermediate ol its ends on tl/e vertical stud 32which is rigid with the base 1;") ol' the brake, and to which the brakepad 31') is also pivoted, as hereinbcfore described. 'llhe lower end ofthe stud 46 engages snugly at 51. freely below the under 'edge of therimv 5 of the turntable to permit the tree movement of the lever andthen projects outwardly in the form of a handle 52.

For guiding the inner end of the hand lever and the inner end 56 of thesecondary lever to more in parallel horizontal planes, the inner portionof the base plate 15.is bent upwardly into a plane at right angles tothe rock shaft 20, forn'iing a guide standard 60 which is provided withtwo oblong parallel horizontal slots'(31-:i1id 'il2,'the upper one illof which has a width equal to the thickness of the inner end of the handlever, and the lower one 62 of which has a width equal to the thicknessof the inner end 56 of'the secondary lever. The outer ends of theseslots terminate in substantially the same vertical planes, and the slotsarc of sullicient length to permit of the necessary movements of thelovers.

For automatically swinging the brake shoe 30 into an operative positionfrom an inoperative position, a spiral spring or other yielding member(35 is connected at one end to the secomlary lever 50 intermediate ofits ends, and at its other end to the upturned portion i7 01'' the baseplate 15. "lhis yielding member 65 is preferably maintained at all timesunder a tension tending to elongate the same, and tends to draw the free'endof the secondary "lever rcar\\-'ardly to actuate through the link l5and pintle 37, the two links 35 and 37 ot the toggle joint controllingthe movement of the brake. pad 30.

For holding the brake shoe ill) in in'opcrative position, a catch isprovided which rpmpriscs an oblong llat crank arm 70, arranged npon theinside of and in slidingcontact with the. upturned portion 60 of thebase 15. The inner end of this catch 70 is provided with a hub or collar71 rigid therewith, surrounding the rock shaft 20 nd detachably lixcdthereon by a pin 72 extending through the collar. This catch plate 70 isprovided upon its upper edge adjacent ils outeror free. end, with anupwardly projecting lug 75' the outer and inner edges T-l of whichconverge upwardly and normally project into the, path of the inner endof the hand level" 48. This catch plate is also provided in its outer'portion i i ll the secondary lever 50 aga nst movement when the'brake isset in its inoperative powith an oblong slot .75, extendinglongitudinally ofthe plate. The inner portion of this slot 75 issubstantially the same width as the thickness of the free end of thesecondary lever 50,, and the lower wall of this shit is recessedadjacent the outer end of the slot, to receive the free end of thesecondary lever 50, and to provide an abrupt outwardly facingsubstantially vertical shoulder 76, adapted to hold the free end ofsition. The free end of the catch plate 70 is normally forced upwardlyby means of a spiral spring 77, surrounding the rock shaft 20 betweenthe catch plate 70 and the front bea'ring 18 of the rock shaft, one end.of the spring 77 being secured in an aperture. 78 provided therefor inthe catch plate 70, and the other end of the spring being secured in anaperture 79 provided therefor in, the upturned portion 17, of the base15. I

The outer inclined edge wall 74 of the lug 73 intersects the upper edgewall of the catch plate 70 in a line substantially 1n vertical alinementwith the shoulder 76 formed by" the recessed portion of the slot 7 51inthe plate, andthe proportions and arrangements of the slot 75 and itsrecess, and

the proportions of the secondary lever 50, hand; lever 48 and oblongslot 47 of the .hand lever are such that the inner free end 55 of thehand. lever may be brought into a position upon the upper edge of thecatch plate 70, between the lug 73 and the forward end of the plate andwhen in this position, the inner end 56 of thesecondary .lever will bebrought into position in the recess in front of and against the shoulder76 of the slot 75 of the plate. The oblong slot -17 of the hand leverpermits the inner end of the hand lever to be oscillatedinwardly againstthe adjacent inclined wall 74 of the lug 73 of the catch plate, and tobe brought into position-upon the top Wall of the lug, forcing thecatcluplate downwardly with respect to the secondary lever 50, andreleasing the inner free end of the secondary lever from engagement withthe shoulder 76, whereupon the free end of the secondary lever will bedrawn inwardly toward the rock shaft 20 in the slot 75 of the catchplate and into engagement with the inner end wall of the slot, whichlimits the inward movement of the secondary lever.

chine, or in other words, when it is desired to set the brake in aninoperative position, the handle 52 of the hand lever 48, is

forced manually inwardly or toward the the slot 75 of the catch plate,and the ups per edge of the lug 73 of the catch plate is maintainedbelow the lower wall of the slot -61 of the guide standard 60, until thefree -end of the secondary lever passes in front of and clears theshoulder 76 of the catch plate, whereupon the free end of the catchplate is automatically lifted by-means of the spring 77, and the brakeis thus auto maticallylocated in the inoperative position as shown inFigs. 2 and 3.

When the brake is thus set in its inoperative position, it may bereleased either manually by moving the hand lever 48, or automatically,as will be described hereinafter. For manually releasing the brake, thehandle 52 of the hand lever 48 is moved out w-ardly or away from therock shaft 20, whereupon the inner end 55 of the'hand lever will actupon the inclined shoulder 74 of thecatch plate and force it downwardly,thus releasing the inner end 56 of the secondary lever from engagementwith the abrupt shoulder 76 of the catch plate, whereupon the inner endof the seconda lever will be drawn toward the rock sha i t 20 by thespring 65, taking up the lost mo tion between the secondary lever andthe hand lever, and moving the hand lever withthe secondary lever.

This movement of the secondary lever is transmitted through the link 45to the pintle 37 of the toggle joint and through the toggle joint to thebrake pad 30, whichis thus moved outwardly away from the axis of theturntable and into engagement with the innor surface of its rim. Thebrake pad is thus brought into engagement with the rim of the turntable,before the secondary lever has completed its movement and before thepintle 37 of the toggle joint has been brought to its dead center orinto alinement with the,outer ends of the links 35 and 38 of the joint.

The brake pad having thus been brought into engagement with the rim ofthe turntable, the secondary lever continues its movement under theaction of the spring until the free end of the secondary lever is bihtto a stop against the end wall 0F through its bearing 3!) in the plateit), as

shown in Fig. l. thus gradually increasing the pressure of the frictionpad upon the rim of the turntable.

For automatically applying the brake a ft-er it has been manually set inan inoperalive position as heretofore desrribed, im-

proved means are employed adapted to bev actuated by a movable part ol"the talking maehin'e, to rotate the ['(N'h shatt 20, when desired, toswing the. tree end of the catch downwardly a sullieient distant-e torelease. the inner end 54) ol the secondary lever. One embodiment ofsuch means comprises. as shown in the drawings, a vertical stud St)rigidly secured at its upper end, to the under side of the tone. arm 10,and terminating at its lower end in the rear of the turntable and in)1'o.\'imit y to the upper surface of the top 3 of the motor easing ofthe talking machine.

Arranged between this stud Ht) and the collar 27 at the rear endo't',the roek shaft 20, is a vertical pivot Ht which projerts upwardlyfrom the top It ol the motor casing and is rigidly secured thereto inany suitable manner; for instance, by having its lower portion extendthrough. the top It, and having a nut 82 threaded upon the lower end ofthe pivot and engaging against a washer 3 interposed between the nut amta eounterbored seat R-t in the under side of the top 3, the pivot beingalso provided with a Hat circular washer o rigidly seeured theretoconcentric therewith. aml bearing against the upper surt'aee ol'the top3 of the. casing.

snugly but rotatably mounted upon the upper portion ot'the pivot 81 is asleeve 86, the lower lace of which bears against the upper 'laee of thewasher The upper portion ol this sleeve is redueed in diameter to Form ac \'lindrical bearing Hi coaxial with the pivot. Upon this bearing 87 isrotat'ively mounted one end of a substantial llat horizontal arm 88,whieh extends rearwardly lr m the pivot RI, and the outer end ol". whiehis bil'ureated to l'orm two lingers S9 and 9 'lorming a horizontal yoke\vliirh may be arranged in the path ot and to enrbraee the lower end ol'the stud S0 of the tone arm. This llat arm is l'rietionally anda'ljustably retained in any desired position of rotation with respeet.to the pivot 31 by means of two l'rielion washers 9t and 92, made ol'liber or leather or other suitable material. One. ol' these washerssurrounds the sleeve 86, between the arm and the lat annular shoulder 5)formed between the lower portion and the upper reduced portion of thesleeve, alul the other surrounds the reduced portion ot the sleeve andis in engagement with the upper side of the arm.

The arm is yieldingly pressed between these two washers 91', 92, bymeans of a yielding spider 9t made of tempered steel or other suitablematerial, the arms 95 of whieh engage against the upper friction washerH2. The spider is ai ljustably held in engagement with the upperfriction washer. by means of a nut tlt'i. which is threaded upon theupper end of the sleeve so, the upper end being preferably rei'lueed forthis purpose to provide an annular shoulder 5.)? between thetl\t".:l(lt-(l portion and the main portion ot' the sleeve, againstwhich the nut may be tightly clamped. The sleevi- Ht) is detaehahly heldagainst upward movement by a rap serew 9H. threaded into the upper endof the pivot, the head of the srrew being rlamped tightly against theend ol"the pivot and overlapping, loosely the upper end of the sleeve,the sleeve preferably having a slight amount of end movement between thehead of the screw 98 and the washer 85.

For transmitting'the rotary movement of the sleeve St; to the roek shaft20, an Offset arm J!) is rigidly seem-ed at one end to the lower end ofthe. sleeve. St in an annular recess ttlt) provided therefor. The freeend of this oll'set arm is freely. movable in a recess [05 providedtherefor in the upper side of the top 3 of the motor casing, and thistree end is provided with an oblong slot the, in whieh loosely engagesthe stud rigid with the. eollar 27. oi the rock shaft ill.

liy this construction the arm 88. Parrying the lingers St and SN). iseonnected to the sleeve tsti with sullieient pressure to release the.brake, through the aetion ot' the arm 5.)!) and stud 28, without movingthe yoke or tingers Sit and J0 with respect to the sleeve. S6. The armSh, however, may be easily amt i uieklv moved into any desired ositionol" adjustment. with respeet to the sleeve St'. by applying a. pressureto its tree end slightly in exeess'ol' the amount. ot pressure needed torelease the. brake. The arm mav thus be adjusted so that the stud U willbe brought into engagement with the inner linger 5'.) ol' the arm at anydesired point in the movement ol the tone arm l to apply the brakeautomatically, and the adjustment may obviously be made so that when thetone arm has rea hed the end of its path in playing any reeord. themarhiue will be automatically stopped.

lnthe operation of this automatic brake, the lower end ot the stud Stlotthe tone arm.

' he swung freely outwardly to bring it into a starting position, and bya further outward movement the stud 80 may be brought into engagementwith the outer finger 90 of the arm 88 to eilect an outward adjustmentof the arm with respect to its sleeve 86'. The

arm may thus be adjusted either inwardly or outwardly by the movement ofthe tone arm. in two ways. The first is by swinging the tone arm 10outwardly beyond the record until the stud 80 engages thefinger 90 andconsequently moves the inner finger 89 to a position in which it must beengaged by the stud 80, when the tone arm 10 is swung inwardly, beforethe stylus is in alinement with the innermost convolution. The tone arm10 is then swung inwardly until the stylus is in alinenient with theinnermost convolution of the record, whereupon the stud 80 will engagethe finger 89 and turn the lever 88 upon its pivot, such motion beingpermitted by reason of the friction between the two arms 88 and 99. Whenthe stylus is in alinement with the inner convolution of the record, thefinger 89 will have been automatically adjusted to stopping position..The tone arm is then swung outwardly until the stylus is in alinementwith the outermost convolution of the record and in coming to suchposition the stud 80 will not have engaged the finger 90. The lever 52is then operated to move the brake 30 in to the position shown in Fig. 1and the stylus placed in the outer end of the groove. After the tone arm10 has swung again over the record by reason of the engagement of theneedle with the groove of the record tablet, the stud 80 will again comeinto engagement with the finger 89 and moving it slightly will trip thebraking mechanism and stop further rotation of the turntable. Theengagement of the stud 80 with the finger 90 wheneyer the swinging arm10 is moved outwardly to a position in which the stylus is outside ofthe outermost convolution of the record tablet, is for the pur pose ofmoving the inner finger 89 to a position in which it must be engaged bythe stud 80, as the arm 10 is swung inwardly, before the stylus is inregistration with the inner end of the record groove, thus enabling theoperator to always set the device by the arm 10 to operate at the end ofthe reproduction of sound of any selected record if he so desires,irrespective of the diameter of the inner convolution of the recordgroove.

T he other way of setting of the mechanism The stopping mechanism may-beset may be employed when the lever 88 is in such a position that thefinger 89 would not be engaged by the stud 80 when the stylus is in theinnermost convolution of the sound record groove. The mechanism may thenbe set so that it will operate automatically at the end of thereproduction of sound from a particular record tablet by swinging thearm 10 to bring the stylus into a inement with the innermost convolutionand then swinging the outer finger 90 outwardly to move the lever 88outwardly until the finger 89 is brought in engagement with the stud 80.After that the stylus is placed in the outer convolution and the brakepad 30 moved out of engagement with the turntable. In Figs. 10 and 11 isshown a modified construction for imparting the motion from the swingingtone arm 10 to the mechanism for releasing the brake automatically. Thismechanism is similar to that illustrated in Figs. 2 and 7 of thedrawing, but in this form of the device, the fingers 89 and 90 of thearm 88' are arranged substantially vertical instead of horizontal, andare mounted firmly upon the rock shaft 20. In this form of the device,adisk 107 ssecurely fastened or attached to the rock shaft 20, as by apin. 108, extending through a flange or hub 109 on said disk 107, andthrough said.

rock shaft 20. Adjacent this disk 107, which is provided with a planeface, is arranged the friction washer 91 loose on the shaft 20, andadjacent the washer 91 is the arm 88,

' also loose on the shaft 20. Adjacent and beyond said arm 88' is theother washer 92, which is clamped or pressed against the arm 88, by thearms 95 of the yielding spider 94, which, in turn, may be held in apredetermined position by a nut 96 threaded over the e d of the rockshaft 20, and prevented from' accidental turning or displacement in anysuitable manner, as by a check nut 110.

In applying this invention, it is obvious that various modificationsmight be made to meet various conditions, and that manychanges might bemade in the constructions hereinbefore described without departing fromthe spirit of this invention or the scope of the appended claims.

Having thus fully described this invention, I claim and desire toprotect by Letters Patent of the United States:

1. An automatic brake, comprising a brake member, a rockshaft mounted tooscillate in a fixed axis, a catch carried by said rock-shaft toholdsaid brake member in inoperative position, and means pivoted upon anaxis transverse to the axis of said rock-shaft for automaticallyrotating said rock-shaft to release said catch.

2. An' automatic brake, comprising a brake member, a rock-shaft, a catchcarried i by said rock-slut it to hold said brake. member in inoperativeposition, and means for rotating said rock-shaft; to release said catch,said latter means comprising two coaxially rotatable membersfriction-ally rctaincd in prcdetermined relationship with respect toeach other with sutlicient force to release said brake. member, butfreely adjustable rotatably with respect to each other by a pressureslightly in excess of the pressure required to release said brakemember.

3. The combination in an automatic brake, of a brake member, meansforrelez tsing said brake member, comprising two coaxially rotatablemembers frictionally rctained in predetermined relationship with respectto each other with sutlicient force to release said braltc member, butfreely adjustable lotatabl with respect to each other by a pressureslightly in excess of the pressure required to release said bralte.member.

4. The combination .in an automatic brake, ot' a brake member catch forholding said bralv'e member in inoperative position, and means forreleasing said catch, said means comprising two members frictionallv.retained to predetermined relationship with respect to each other, withstillicient .t'orcc to release said catch. but mov able with respect toeach otherin response to a force slightly in excess of the forcerequired to release said catch.

An automatic brake comprising a -bralcc member, a rock-shaft. anoscillatory catch rigid with said rocleshat't to hold said brake memberin inoperative. position, amt oscillatol' means pivoted upon a tixedaxis for automatically rotating said rocksha'lit to release said catch.

(1. ,-\n automaticbrake, comprising a movable brake member, means [ormoving said hralcc member into operative position. aml means for holdingsaid bralte mem er in inoperative. position, said last ment oned meanscomprising a roclt-slral't, yielding means tending to rotate saidrock-shaft. through a limited arc, a catch-plate rigid with saidrtxjk-shal't and provided with a slot having a recess forming aninternal shoulder, and a lever operativelv c nnected to said brakemember having a tree end arranged to reciprocate in said slot and adapted to be engaged by said shoulder.

T. An automatic bralt-e, comprising a movable. brake member. means tormoving said bralt'c member into operative position, and means forholding said brake member in inoperative position, said last mentionedmeans comprising a rock-shalt, yielding means tending to rotate saidroclt-shat'i through a limited are, a catch-plate rigid with saidrock-shaft and prodided with a slot having a recess forming an internalshoulder, a lever operatively connected to said brake member ha ring afret-end arranged to reciprocate in said slot; and adapt:-

ed to be engaged by said shoulder, and

vwith a braking 1nember,of a pivoted catch member arranged to hold saidbraking member 111 an inoperative position, a pivoted arm for releasingsaid catch, and a frictionalconnect-ion intermediate said arm and saidcatch member, whereby movement is communicated to said catch member torelease said braking member when said arm is moved in one direction.

9. In a stop mechanism, the'combination of a brake member, a catch formoving said brake member to an operative position, means for holdingsaid brake member in an inoperative position, means for actuating saidcatch and means including a frictional connection intermediatesaidactuating means and said catch for ca'nsing said'catch to move with theactuating means to release the brakeand also permitting the actuatingmeans to be moved independentlyof the catch for adjustment.

10. in a stop mechanism, the combination of a pair of coaxially pivotedmembers, one of which is free, brak ng means releasable b the other ofsaid meml'iers, and frictional means between said n'icn'ibcrs causingsaid members to move together about their pivot to release the brakingmeans and also permitting said free member to be moved relativel wto theother member for adjustment.

11. in a stop mechanism, the combination ot a pair of coaxially pivotedarms, a movable bralt'e member releasableby one of said arms, andfrictional means connecting said arms and permitting the other oi saidarms to move. both with and relatively to said last. mentioned arm andto actuate the same when moving therewith in one direction about thepivotal axis of said arms.

, 12. in a stop mechanism, the combination of a movable brake member,releasing mechanism therefor, and actuating means for and connected tosaid releasing mechanisn'i, and movable both with and relatively to saidreleasing mechanism, and arranged to move therewith when actuating saidreleasing nn-chanisiii.

3. In a device of the class described, a swinging member, a rotarvmember, a brake and means for propelling the same against. a portion ofthe rotar v member, and means for releasiimsaid brake when the swingingmember reaches a predetermined position,

said brahe releasing means including in its bcr'ovcr the rotary memberto the point wbyhere it is desired to stop the rotary memer. a

l4. In a device of the class described, a swinging member with aprojection secured thereto, an arm adapted to engage said projection, apivot on which said arm is mounted, a second arm mounted on said pivot,frictional means connecting said arms so that onei may be movedrelatively to the other when suflicient force has been applied toovercome the friction between them, a spring actuated brake engaged-bysaid second arm, and a rotary member against which said brake impinges.

. 15. In a device of the class described, a swinging member with aprojection secured thereto, an arm adapted to engage said proection, apivot on which said armis mounted, a second arm mounted on said pivot,frictional means connecting said arms so that,

one may be moved relatively to the other when sufiicient force has beenapplied to overcome the friction between them, a spring actuated brakecontrolled by said second arm, and a notary member against which saidbrake impinges. v

16. In a device of the character described,

the combination with a rotatable member and a traveling member movablerelatively to said rotatable member, of braking mechanism and meansadapted to release said braking mechanism for stopping the rotatablemember, said releasing means comrisin a frictionally mounted deviceadustabe to a position for releasing the braking mechanism .when saidmembers reach a predetermined position by moving the traveling memberover the rotatable member to said predetermined position.

17. In a stop mechanism, the combination with a rotatable element and atraveling element movable relatively to said rotatable element, of amovable member for elfecting the stopping of said rotatable element, acatch for holding said member in a position inwhich it does not effectthe stopping of said rotatable element, means for moving said member toa position in which it is effective for stopping said rotatable element,means for actuating said catch to release said member, and meansincluding a frictional connection intermediate said actu- 'ating meansand said catch for causing said catch to move with said actuating meansto effect the stopping of said rotatable element, and also permittingsaid actuating means to be moved independently of said catch intopredetermined adfusted positions in the path of said traveling element.

18. In a stop mechanism, the combination with a rotatable element, of apair of coaxially pivoted arms one of which is free, a movable memberreleasable by said other armto effect the stopping of said rotatableelement, and frictional means connecting- Said 'arms, said free armmoving with said other arm under a force sufiiclent to actuate saidother arm and also moving relatlvely to said other arm under forcesufiicient to overcome said frictlon.

19. In a sto mechanism, the combination with a rotata le element and atraveling element movable relatively to said rotatable element, ofmechanism for effecting the stopping of said rotatable element, andmeans adapted to release said mechanism to effect a stopping of saidrotatable element, said releasing means comprising a frictionallymounted device adjustable to a position for releasing said mechanismwhen said elements reach a predetermined position, by moving saidtraveling element over said rotatable element to said predeterminedposition.

20. In a stop mechanismythe combination with a rotatable element and atraveling element movable relatively to said rotatable element, ofmechanism for stopping the said rotatable element and means adapted torelease said mechanism for effecting the stopping of said rotatableelement, said means comprising a pair of arms pivoted together, one ofWlllCll isrelatively free and the other of which coacts with saidstopping mechanism, said free arm being provided with separatedbranches, one branch being arranged to be engagedby said travelingelement to move said free arm with respect to the other arm and adjustit to a position to actuate said stop mechanism a predetermined point inthe travel of said traveling element across said rotary element, and theother of said branches being arranged to be engaged by said travelingelement and moved with respect to the other of said arms in swingingsaid traveling element to the "limit of its motion in the oppositedirection.

21. In an automatic brake, the combination with a rotatable element anda travel- .ing element movable relatively thereto, of

mechanism for effecting the sto ping of the rotatable element, and meansor releasing said mechanism, said means-including a pair of coaxiallypivoted members, one of which (to-acts with said mechanism and the otherof which is relatively free and is located in the path of said travelingelement and adapted to be operated thereby, and means for causing saidfirst mentioned member to move with said free. member about their axisto release said stopping mechanism and for permitting said free memberto also have independent movement relative to theother member.

22. In a stop mechanism, the combination of a rotatable element and atraveling element movable relative thereto, of a brake IL is herebycertified that in Lottnrs Patent l,' !ll,.';7.i, granted arch 115, 1917,upon Hm npplilz-ltirm nf Wilbur" lh-unmmu "f Sh-n-hmlvillv Burnugh,

Nvw Jorsuy, for an imprhvnnmnt in Auhmmliv Hnduv. furl'.|lking-Mm'llilms," vrmm uppvnr in tluprinlwl \pm-ifivnliun nequiriugrurrm-tilm :h fnll m'st Pug? 6,

IN! 81 r'lzlim U, [or a um-h n-ml mlmn': smmmgv :|l||| vlaim. line S13.Fm tlw wunl lll'lllllfi l'mul u (Mir/1: :myl Hull- (.he said Letterslnhmt should be read will: thew corrections therein that the same mayconform (.u the rornnl of the cause in the Patent Office.

Signed imd sealed this 3=l day of April, A. 1)., 1917.

I". \V. II. CLAY,

Acting Uonnnissioner of I 'atenta

